HARRISBURG, Pa. (CBS) - A new poll shows Pennsylvania voters are divided over Governor Tom Corbett, in more ways than one.

The new Quinnipiac University poll shows that 39 percent of Pennsylvania voters approve of Gov. Corbett’s job performance while 38 percent disapprove.

And Tim Malloy, assistant director of the Quinnipiac University Polling Institute, says voters are also sharply divided along gender lines.

“He’s far more popular with men than he is with women,” Malloy says of Corbett. “There’s an 18 percentage point difference. And a significant 23 percent are ‘undecided’ on the governor.”

The good news for Corbett, Malloy says, is that he is doing better than other new Republican governors in Ohio and Florida, and that his overall numbers have apparently stabilized after a sharp drop in Quinnipiac’s last poll in April (see previous story).

The poll also shows that almost two-thirds of Pennsylvania voters say the benefits of natural gas drilling outweigh the environmental impacts, while even more favor taxing it (see related story) — which Gov. Corbett opposes (related story).